The light leak issue was made out to be more of an issue than it really is. Unless you're taking pictures in pitch black rooms, with the lens cap on or with a flashlight aimed driectly at the top lcd then it won't be an issue. Even if you do get a camera pre-fix (which is a small piece of tape by the way), you can send it into Canon and they will add the fix. Don't let a good deal pass you by because of this concern.
Completely understood the light leak issue. I don't think I'll ever run into such situation where it's going to affect my work if the model had such an issue. However, if I am about to spend my hard earned $2-$3K on a camera, I would expect that camera to be as near perfect as it can be.